Finding the Fourth Proportional to 207,663.26, 311,520.70 and 81,287.06
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Solution
The fourth proportional to 207,663.26, 311,520.70 and 81,287.06 is: 121,940.69
Step by Step Solution
- Step 1: Write the proportion equation
207,663.26 : 311,520.70 = 81,287.06 : x - Step 2: Convert to fraction form
207,663.26/311,520.70 = 81,287.06/x - Step 3: Cross multiply
207,663.26x = 311,520.70 × 81,287.06 - Step 4: Simplify right side
207,663.26x = 25,322,601,832.14 - Step 5: Solve for x
x = 25,322,601,832.14/207,663.26 - Step 6: Final answer
x = 121,940.69
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.